首页|Design and implementation of code acquisition using sparse Fourier transform
Design and implementation of code acquisition using sparse Fourier transform
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Code acquisition is the kernel operation for signal synchronization in the spread-spectrum receiver.To reduce the computational complexity and latency of code acquisition,this paper proposes an efficient scheme employing sparse Fourier transform(SFT)and the relevant hardware architecture for field programmable gate array(FPGA)and application-specific inte-grated circuit(ASIC)implementation.Efforts are made at both the algorithmic level and the implementation level to enable merged searching of code phase and Doppler frequency with-out incurring massive hardware expenditure.Compared with the existing code acquisition approaches,it is shown from theoreti-cal analysis and experimental results that the proposed design can shorten processing latency and reduce hardware complex-ity without degrading the acquisition probability.
code acquisitionhardware structuresparse Fourier transform(SFT)code phase estimationDoppler frequency esti-mation
ZHANG Chen、WANG Jian、FAN Guangteng、TIAN Shiwei
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College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China
National Innovation Institute of Defense Technology,Academy of Military Science,Beijing 100071,China
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